An externality is defined as a benefit or cost that is imposed on a third party, such as society, other than the producer or consumer of a good or service, or, more simply, an economic side effect.
The bacteria is a thermophile and is widely distributed in soil, hot springs, ocean sediment, and is a cause of spoilage in food products. It will grow within a temperature range of 30-75 degrees Celsius. Some strains are capable of oxidizing carbon monoxide aerobically.iological indicators are used in conjunction with chemical indicators and process indicators to validate sterilization processes. It was first described in 1920 as Bacillus stearothermophilus, but, together with Bacillus thermoglucosidasius, it was reclassified as a member of the genus Geobacillus in 2001.
Bacillus stearothermophilus. Definition. noun. A rod-shaped, endospore-forming, Gram-positive bacterium that belongs to the division Firmicutes. Supplement. It is thermophile, and lives mostly in soil, hot springs, and ocean sediments. It can also cause spoilage in food products.